Portable sawmill.



G. BRYAN.

PORTABLE SAWMILL.

APPLICATION FILED NOV. 14, 1908.

Patented Mar. 15, 1910.

4 SHEETS-SHEET 1.

G. BRYAN.

PORTABLE SAWMILL.

APPLIOATION FILED NOV. 14, 1908. I 951,937 I Patented Mar.15,1910.

4 SHEETS-SHEET 2.

G. BRYAN.

PORTABLE SAWMILL.

APPLIUATION FILED NOV. 14, 1908.

951,937, v Patented Mar.15,1910.

4 SHEETS-SHEET 3.

G. BRYAN.

' PORTABLE SAWMILL.

APPLICATION FILED NOV. 14,1908. 951,937., Patented Mar. 15,1910.

4 SHEETS-SHEET 4.

Will"I"IIIIIHNIIIIMIIIWI h#IIIIHIIIIIIHIIIIIIHH IlIIlIIIIIIII/IIIIIIIIII UNITED STATES ATENT orator...

GORDON BRYAN, OF DALLAS, TEXAS, ASSIGNOR TO BENJAMIN F. WATKINS OF MORRISTOWN, NEW JERSEY.

PORTABLE SAWMILL.

Specification of Letters Patent. Patented Mar. 15, 1910- Applieation filed November 14, 1908. Serial No. 462,569.

' To all whom it may concern: 1 Be it known that I, GORDON BRYAN, a. citizen of the United States, residing in Dallas, in the county of Dallas and State of Texas, have invented certain new and useful Improvements in Portable Sawmills, of which .lanes and wagon-trails through standing timber. Lightness must, of course, be attended by adequate strength and rigidity. This object is attained by the employment of a light, strong, non-reciprocating log bed having ways longitudinally thereof upon which the saw carriage reciprocates, combined with carrying wheels and means whereby the log bed maybe held elevated for transportation, or belowered to the ground for work. When lowered the ground ali'ords the most stable of foundations for the log bed which may, therefore, be made as light as is consistent with the work to be done. The motor,- if of appropriate character, may be mounted on the saw carriage or bev otherwise disposed. When a steam motor is employed the generator may be mounted and transported in any desired way.

The embodiment of the invention illustrated the accompanying drawings comprises a band saw, such a saw being, for some reasons, preferred. i

Details of constructlon maybe varied by those skilled in such matters without departing from the spirit of the invention.

Figure l is a side elevation with the log bed lowered and restmg on the ground;

Fig. 2, a side elevation with the log bed in elevated position; Fig. 3, a side elevation showing diagrammatically. the devicesfor moving the saw carriage back and forth on the log bed; Fig.4, a detail plan view showing part of the mechanism for raising and lowering the saw; Figs. 5 and 6 are, respectively, a vertical section and a side elevation of the bolster for the front axle showing how the frontaxle may turn about the axis of the king bolt and be swung outward and inward to raise and lower the log bed; Fig.

7, is a plan view of the machine with the log bed lowered; Fig. 8, a detail view in plan showing the connection between the front axleand the log bed; Fig. 9, a similar view showing the connection between the rear axle and the log bed; Fig. 10, a view on an enlarged scale and in rear elevation of the machine with some parts broken away; Fig. 11, a. perspective view of the saw'carriage andparts'carried thereby; Fig. 12, a section on the line 1212 of Fig. 13; Fig. 13, a. de-

tail view partly in planand partly in section showing the means for adjusting the bearings of the band saw shafts to tighten the band saw; Fig. 14, a detail view 1n sectionv showing the manner of connecting the upper ends of the posts of the saw carriage; and Fig. 15, is a. form of knee.

Preferably the log bed comprises two outside longitudinally disposed beams or sills 1, two centrally disposed longitudinal beams 2, and two intermediate beams 3 on opposite sides of the middle beams. These beams.

are (Fig, l-tl) connected at or near their ends by (gross-beams 4. The middle beams 2 are'prdlonged as shown at 5 and 6 for a purpose hereinafter explained. Longitudinal truss rods 7 on opposite sides of the beams 3 and transverse truss rods 8 serve to strengthen and stiffen the log bed. Rails 9 on which the saw carriage is mounted are supported on the cross beams 10, transversely perspective view of a. special arranged; beams 11 and cross beams 4.

These cross beams are all supported on the longitudinal beams of the frame. 4

Crank axles l3 and 14 on which the carrying wheels 15 are mounted are provided at opposite ends of the log bed and are so mounted that they can be turned in such manner as to hold the wheels below the. log bed or beyondits ends so as to lower it to the ground. Preferably the front axle 13 is secured to a metal block or casting 16 (-Figs. 5 and 6), in turn connected by a vertical king bolt 17 with another block or casting 18 (Fig. 5) so that the lower cast- ;ing with the axle may turn about the axis of the king bolt. The arrangement is such that the axle may rock transversely of the longitudinal axis of thelog bed. The upper castino 18 is'formed with arms 19 and 20 attached by horizontal bolts 21, 22 (Figs. 2 and 8), to the extensions "60f the beams 2. -The bolt 21 serves as a pivot for the axle When the wheels are in the position shown in Fig. 2 and the bolt 22 is in position, the

' 1. In like manner the rear'axle 14 is attached to a casting 23 having arms 24, 25, the arm 25 being pivotally connected by a bolt' 26 .with the extensions 5 of beams 2,

while the arm 24 is connected therewith by a detachhble bolt 27.so that the castingmay be connected to the extension 5 in such inanner as to hold the rear eels under the log bed or permit them to assume the position shown in Fig. 1 with the log bed resting on the ground. The castings to which theaxles are attached are really bolsters and are hereinafter referred to as such.

The frontaxle 13 carriessocketed casting 28 to which the tongue 29 may be attached in the manner indicated. The socks ets are alsoadapted to receive levers 30 employed to rock the axle to elevate and lower the log bed. Similar socketed castings 31 adapted to receive levers 30 are attached to the rear axle.

The saw is mounted on a carriage that reciprocates longitudinally of the log bed. Preferably this carriage comprises two trucks, 32, 33, each of which consists of a frame constructed of two parallel I-beams 34 connected by two plates 35 and having trolley wheels 36 that travel on the rails 9. Each of the plates 35 is formed on the top with a socketed boss 37 in which is seated vertical post 38. The posts are preferably tubular and are so spaced as to accommodate the band saw 39 and its operating mechanism. Two of the posts are made higher than the other two to allow the saw and its supportin wheels to be elevated to such an extent above the shorter posts as to permit the sawto be removed from and applied to its supporting wheels. Each post 38 is provided with a verticalra'ck bar 40 and a vertically movable sleeve 41 has at the top a removable flanged cap 42 (Figs. 11 and 14) with a threaded boss 43 engaging the post. The two posts of each air are connected by transverse cross pieces 44 bolted to the flanged caps 42.. The sleeves 41 have each an inwardly extending lug 45 and such lugs, of corresponding sleeves, are

connected bytransversecross bars 46, cross 'braced by truss rods 47. The pairs of sleeves are each formed with opposite bearings 48 to receive the two shafts that carry the saw-supporting wheels 50.. A

To adjust the tension of the band saw, I

i may employ the construction shown in Fig.

13 where the bearing 48 has an arm 45 excured to the crossbar. The arm 45 carries bolts 53 that extend through slots54 in plate 52 and have nuts 55 by means of which the bearing may be securely heldwhen once adjusted to hold the saw under desired tension.

In order that the saw may be adjusted to the. log the following mechanism for this purpose is'provided: Each sleeve carries a pinion 56 meshing with the rack 40 on its post, and fast on a shaft 57 carrying a sprocket wheel 58, and corresponding sprocket wheels on diametrically opposite sides of the carriage are connected by a sprocket chain 59. The two shafts on one side of the carriage are provided with crank handles 60 by means of which all four pinions may be operated to elevate and depress the saw. The sleeves tnay be held in place by means of pins 62'adapted to engage holes 61 in the posts 38 (Fig. 10). The holes 61 are arranged vertically in posts and they may be, if desired, numbered or the posts be provided with scalesto indicate the elevation of the saw above the log bed.

An engine for driving the saw is shown mounted on thesaw carriage. It may be at steam turbine 63 supported as shown on the'frame bars'46' and connected by worm, or other suitable gearing 64, with one of the saw shafts or arbors 49.

A flash boiler 65, connected by a flexible pipe 66 with the turbine, is shown supported on bracket arms 67 on one of the trolley trucks of the-saw carriage. V

The saw carriage may be moved back and forth on the log bed directly by hand, I but preferably Windlass mechanism is used. Winding drums 68 are connected with a shaft. 70 operated by a crank handle 69 at the front end of the log bed, and ropes 71 connect the drumswith hooks 72 at the front end of the apparatus. In this way the saw carriage may be moved in one directionand it may bemoved in the opposite direction by hand, but if it is desired to move it in'the opposite direction by power, I may provide hooks 72 at the opposite'end of the saw carriage and lead the ropes 71 over thepulleys 73 at therear end of the apparatus and connect these ropes with the hooks 72 at the rear end of the carriage.

Any suitable means may necessary, for holding the log on the log bed. a Fig. 15, shows a knee 7 5 of novel construction. It is made intwo parts. The lower part 76is made to engage one of the ;I-beams 11 so as to be held against vertical movement while free to slide thereon, and isheld securely in place by means of a pin 80 passing through holes 81 in the I-beam. The upper part 77 of the knee is detachable and is made to engage the lower part by,

tending into a dove-tailed slideway formed between the cross-bar 46 anda plate 52 selower section 76. By removing the upper be employed, if

section 77, a log may be easily rolled over will lowering the log-bed to rest upon vthe the lower section of the knee and then the upper section may be replaced. Furthermore, when a log is partially cut the upper .section 77 may be removed so that the saw may operate to a lower level on the log.

Other necessary appurtenances of a saw mill may, of course, be used, such as saw guides,vone of which I have indicated at 82. When it is desired to remove a band saw from its supporting wheels, the cross-bar 44 and the caps-42 of the front or shorter posts 38 are removed and the sleeves 41 on the rear or longer osts are elevated to the level of the tops 0 these posts. In this position the band wheels are held so as to permit the band saw to be easily withdrawn or replaced.

I claim: '1. A portable saw mill comprising a saw carriage, a log bed having ways longitudinally thereof upon which the saw carriage reciprocates, transporting carrying wheels supporting the log-bed, and means for at ground.

v 2. A portable saw mill comprising a saw' carriage, a log bed having ways longitudinally thereof upon which the saw carriage reciprocates, front and rear transporting carrying wheels, their crank axles, connections between the ends of the log-bed and the respective crank axles, and means for rocking the axles to lower the log-bed upon the ground onto bring the carrying wheels under it-for transportation.

7 '3. A portable saw-mill comprising a saw carriage, a log bed having ways longituditions between anally thereof upon which the saw-carriage whee s reciprocates, transporting carrying supporting the log-bed, means for at will lowering the log-bed to rest upon the ground and a 'saw actuating motor mounted to reciprocate with the saw-carriage.

4:. A portable saw mill comprising a sawcarriage, a log bed having ways longitudinally thereof upon which the saw carriage reciprocates, front and rear transporting carrying wheels, their crank axles, connecthe ends of the log-bed and the respective crank axles, means for rocking the axles to lower the log-bed upon the groundor to bring the carrying wheels 'under it for transportation and a saw actuating motor mounted to reciprocate with the saw carriage.

"5.,The combination of a stationar log bed adapted to lie upon the ground an having on it ways longitudinally thereof adjacent its sides and means between the ways for holding the log to be cut, a traveling saw carriage comprising trucks traveling on said ways and vertical posts carried by the trucks, a saw mounted on thecarriage above the log bed and adapted to make a cut parallel with the plane of the log bed, means for vertically adjusting the saw on said posts to successively. cutthe log, and a motor mounted on the saw carriage.

In testimony whereof, I have hereunto,

subscribed my name. i

" GORDON BRYAN.

Witnesses: t M. W. KIRBY,

W. L. DIAIM 7ND. 

